title: Resonantly diode-pumped Ho3+:Y2O3 ceramic 2.1 µm laser.
abstract: We report what is believed to be the first laser operation based on Ho3+-doped Y2O3. The Ho3+:Y2O3 ceramic was resonantly diode-pumped at ~1.93 µm to produce up to 2.5 W of continuous wave (CW) output power at ~2.12 µm. The laser had a slope efficiency of ~35% with respect to absorbed power and a beam propagation factor of M2 ~1.1. We have measured the absorption and stimulated emission cross sections of Ho3+:Y2O3 at 77 K and 300 K and present the calculated gain cross section spectrum at 77 K for different excited state inversion levels.
authors.affiliation: U.S. Army Research Laboratory, RDRL-SEE-O 2800 Powder Mill Road, Adelphi, Maryland 20783, USA. gnewburgh@arl.army.mil
authors.forename: G A
authors.initials: GA
authors.lastname: Newburgh
authors.forename: Akil
authors.initials: A
authors.lastname: Word-Daniels
authors.forename: Arocksiamy
authors.initials: A
authors.lastname: Michael
authors.forename: Larry D
authors.initials: LD
authors.lastname: Merkle
authors.forename: Akio
authors.initials: A
authors.lastname: Ikesue
authors.forename: Mark
authors.initials: M
authors.lastname: Dubinskii